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Mac OS X v10.5, 10.6: Mail messages generated by applications may have a black background after installing Safari 5 or Mac OS X v10.6.4 After installing Safari 5 (with Mac OS X v10.5.8, Mac OS X v10.6.2, or v10.6.3), or after installing Mac OS X v10.6.4 (which includes Safari 5), you may see a black background instead of readable text in Mail messages that are generated by some applications.... Read More....http://www.k2pedia.com/macos